Source of data: Valuing Wall Street. The data from 1952 on comes from the "Flow of Funds Accounts of the United States Z1”, which is published quarterly by the Federal Reserve. Earlier data are available from a variety of sources from 1900 as compiled by Stephen Wright, University of London
Bond, Stephen R.; Cummins, Jason G. (2004). "Uncertainty and Investment: An Empirical Investigation Using Data on Analysts' Profits Forecasts". FEDS Working Paper No. 2004-20. SSRN559528.
valuingwallstreet.com
Source of data: Valuing Wall Street. The data from 1952 on comes from the "Flow of Funds Accounts of the United States Z1”, which is published quarterly by the Federal Reserve. Earlier data are available from a variety of sources from 1900 as compiled by Stephen Wright, University of London